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A cycle is proposed as a development of the Lenoir cycle, in which the working fluid is expanded isentropically from its peak pressure down to a point where its temperature is equal to T1, the initial temperature. The gas is then compressed isothermally back to the initial pressure. Prove that the thermal efficiency of the cycle is given by
where T2 is the maximum temperature achieved in the cycle.
Calculate the thermal efficiency of the cycle if the initial pressure is 10 bar and the maximum pressure is 35 bar. Compare this to the Carnot efficiency achievable between the temperature limits and explain why this cycle would not be used in practice.[49.9%; 71.4%]
Which of the following causes a system to be irreversible? All of the other choices Mixing two different substances
A mason stretches a string between two points 50 ft apart on the same level with a tension of 10 lb at each end. If the string weighs 0.1 lb, determine the sag h at the middle of the string.
air at mass flow rate of 10 kgs at 1 atm 300 k point1 enters an adiabatic compressor and exists at 8 atm 600 k point 2.
An moles of an ideal gas A and (1-n) moles of an ideal gas B, each at 1 atm, are mixed at total constant pressure. What ratio of A to B in the mixture maximizes the decrease in the Gibbs free energy of the system? If decreases in the Gibbs free energ..
water behind a dam enters an intake pipe at 24psia 5 fts flow through a turbine and exits 200ft below at 19psia 45 fts
Show the software that goes in the ROM (nonvolatile, and must be the same for each slave).
As a game, slide a matchbook across a table, trying to make it stop at some predefined point on each attempt. Measure the distance from the starting point to the stopping point. Repeat this 10, 20, through 50 times. Plot the frequency distribution fr..
water in a pipeline flows with a velocity of 8fts. the pipeline supplies a tank with a level 30 ft above the pipe
an inverted cone is placed in a water tank. if the weight of the cone is 16.5 n what is the tensile force in the cord
determine the expected rating lives in hours of a 35 mm bore 02 and 03 series straight cylindrical bearings operating
A spherical steel pressure vessel (diameter 480 mm, thickness 8.0 mm) is coated with brittle lacquer that cracks when the strain reaches 150 × 10-6 (see figure). What internal pressure p will cause the lacquer to develop cracks? (Assume E = 205 GP..
Design a cord (design the constants k and beta ) so the cord stretches 2.5 times the unstretched length, and the acceleration of the jumper doesn't exceed 3g, and the cord has zero stiffness at the bottom of a 400ft drop.s=elongationk=spring const..
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